<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>评论回车发布</title>
  <style>
    .wrapper {
      min-width: 400px;
      max-width: 800px;
      display: flex;
      justify-content: flex-end;
    }

    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      overflow: hidden;
      background: url(./images/avatar.jpg) no-repeat center / cover;
      margin-right: 20px;
    }

    .wrapper textarea {
      outline: none;
      border-color: transparent;
      resize: none;
      background: #f5f5f5;
      border-radius: 4px;
      flex: 1;
      padding: 10px;
      transition: all 0.5s;
      height: 30px;
    }

    .wrapper textarea:focus {
      border-color: #e4e4e4;
      background: #fff;
      height: 50px;
    }

    .wrapper button {
      background: #00aeec;
      color: #fff;
      border: none;
      border-radius: 4px;
      margin-left: 10px;
      width: 70px;
      cursor: pointer;
    }

    .wrapper .total {
      margin-right: 80px;
      color: #999;
      margin-top: 5px;
      opacity: 0;
      transition: all 0.5s;
    }

    .list {
      min-width: 400px;
      max-width: 800px;
      display: flex;
      flex-wrap: wrap
    }

    .list .item {
      width: 100%;
      display: flex;
      
    }

    .list .item .info {
      flex: 1;
      border-bottom: 1px dashed #e4e4e4;
      padding-bottom: 10px;
    }

    .list .item p {
      margin: 0;
    }

    .list .item .name {
      color: #FB7299;
      font-size: 14px;
      font-weight: bold;
    }

    .list .item .text {
      color: #333;
      padding: 10px 0;
    }

    .list .item .time {
      color: #999;
      font-size: 12px;
    }
  </style>
</head>

<body>
  <div class="wrapper">
    <i class="avatar"></i>
    <textarea id="tx" placeholder="发一条友善的评论" rows="2" maxlength="200"></textarea>
    <button>发布</button>
  </div>
  <div class="wrapper">
    <span class="total">0/200字</span>
  </div>
  <div class="list">
    <!-- <div class="item" style="display: none;">
      <i class="avatar"></i>
      <div class="info">
        <p class="name">清风徐来</p>
        <p class="text">大家都辛苦啦，感谢各位大大的努力，能圆满完成真是太好了[笑哭][支持]</p>
        <p class="time">2022-10-10 20:29:21</p>
      </div>
    </div> -->
  </div>
  <script>
    const tx = document.querySelector('textarea')
    const sp = document.querySelector('.total')

    // const item = document.querySelector('.item')
    const wrapper = document.querySelector('.wrapper')
    const button = document.querySelector('button')

    tx.addEventListener('input', function () {
      sp.innerHTML = `${tx.value.length}/200字`
      sp.style.opacity = '1'
    })
    tx.addEventListener('blur', function () {
      sp.style.opacity = '0'
    })
    
    function fb() {
      //创建节点
      const item = document.createElement('div')

      const list = document.querySelector('.list')
      item.className = 'item'
      item.innerHTML = `
        <i class="avatar"></i>
        <div class="info">
          <p class="name">清风徐来</p>
          <p class="text">${tx.value}</p>
          <p class="time">${new Date().getTime()}</p>
        </div>
      `
      //追加节点
      list.appendChild(item)
      tx.value = ''
    }
    tx.addEventListener('keydown', function (e) {
      if (e.key === 'Enter') {
        e.preventDefault() // 阻止默认的换行行为
        fb()
      }
    })
    button.addEventListener('click', function () {
      fb()
    })

  </script>
</body>

</html>